Change an addition into a subtraction

This potentially resolves the long-standing warning from GCC:
 assuming signed overflow does not occur when assuming that (X + c) < X
 is always false

GCC prints the warning to warn people that you can't check for overflow
with signed integers by doing that (signed integers don't overflow in
the standard).

If we change this to X < X - c, there's no overflow.

Task-number: QTBUG-33314
Change-Id: I5b166610a39559ec7b03c4c31ee5999efefa0c06
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Initialize variable to fix build [-Werror=uninitialized].

The complaining compiler is:
gcc version 4.6.3 (crosstool-NG hg+default-ddc327ebaef2)

Change-Id: Iae488a89d75492e76a39a326b2db36548f8894d0
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Android: Accessibilty: Handle text better

Try harder to actually return text, before TalkBack would not read the
contents of line edits and other text widgets.

Change-Id: Ibb9bb8ac4a2728674f6f5ccf29eda5ed66a81a34
Reviewed-by: Jan Arve Sæther <jan-arve.saether@digia.com>
Enabling CI usage for runtests_androiddeployqt.pl

- Fixed issues when having multiple devices connected at the same
  time.
- Fixed hard coded paths
- Removed not existing function call, which caused test run to exit
  too early.
- Added possibility to add and connect to device, configured as env
  variable.

Task-number: QTQAINFRA-641
Change-Id: I8c1e003ce4ffbc9fdd9572dc55eef8fe92330cba
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>
Use QByteArrayLiteral throughout in QOpenGLVertexArrayObject

Change-Id: Ia362ead0ffdc077bd0db5d980c80464838c934ea
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>